キャビテーション損傷の初期対策

概要

論文の詳細を見る
Many papers on the cavitation erosion are found, but we can not find the paper on the detail of initial cavitation damage. If we have much knowledge of them, it will be possible to decide the shape of peak and surface roughness which does not easily get the cavitation damage in designing process. In this paper, the process of initial cavitation damage was measured by using of two and three dimensional surface profilometer. The results obtained were as follows: (1) Cavitation damage is delicately influenced not only by hardness but also by shape of surface profile. (2) In the initial damage, it is better that the surface roughness is fine and hard. But if the asperities of hardened surface keep suffering cavitation erosion for a long time, some of them fall off at the root of asperities. Then, the quantity of damage suddenly increase. (3) In the appearance of cavitation damage, there is a difference between the case of specimen held to the end of horn and held face to face with horn, because it depends on the direction of bubble flow and pressure distribution.
近畿大学工業高等専門学校の論文
1993-03-20